Portable Water Quality TDS pH Tester 0-9990ppm Digital Detection Measurement LCD Water Purity Monitor For Aquarium Swimming PoolFeature:Lightweight and portable to detect water quality at any time. No matter where you are, traveling/playing/shopping, you can detect the TDS water value at any time, so that you and your family can live in a safe water environmentThe internal use of precision chips, precision chips, accurate testing can be grasped. Specification:Name: TDS-M1 gauge Size: 150*28*15mmNet weight: 53g TDS measuring range: 0-9990ppmTemperature measuring range: 0-99°c, error 32 - 212°f: ± 2%; Electronics: 1*3V (CR2032 Buttom Cel)Probe: Titanium Alloy ProbeNote: Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement. 1 x TDS pH Tester 1.